Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e9fd2c992c19e2aa3befe80f9496063651464ad98792fb0454c0d3278089aed' 
  AND token = 'aDFy/LhVsKKbDs49VVUxUgeqGA9GeoewVGTvtnQVWEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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