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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '725f84bda78b711cc5998fcc115ee8192a33bfc4beae1f395deb89c3832a0f34' 
  AND token = '4aV2tvnp8eA+xSwlCkxvHDvPlzwQ4Wh2o97BolzLONM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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