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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ce06ffe8e18ecca194ebf5a7b8aecf5a315e102d522213d4402e5cac9af71de' 
  AND token = 'fOYC/U7Smup8dvUFPsvMRLPG9aP6jZoGEy0yUARdKJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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