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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3b5f73f32ebae32b7ac276f719f5d2290e4c35a4ba9beda26627ae2aca10398e' 
  AND token = 'bfr/80RijrCR48+Qgmb6slsVCpmQnq4FBEHL++Ar3Ek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}