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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'bf467f440474c680ba07f67559d021b2a7e20b662128e1a94ee5b2b4c09b8e25' 
  AND token = '5RcTDhAna9KppJ5UUJFA0zrLFr6d4/2YMK4R4JVPTXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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