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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02ab4a92e2c436a7225f4674258484c134f23104a0b695e1c9fede067153ad31' 
  AND token = '8bsheXDDZfSxhJ5+xb2XZOBB+mzpyU3Ub0b3sV/f1Eo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}