Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e7bf43fbf44682b05e44b33629d4d619c8e0dd94e2c791aecaa5dce8fe3ccff' 
  AND token = 'iLI8tNwfPbNyfw91cHCCTG927lB75K9gTBmjGoDODwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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