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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c7647f6ee63d30838432be6e1211cf7f35093619380746b8cf28c573a6f7b0d' 
  AND token = 'Yr4S/BEA3eFnmjH50e/+z1/eR3Qi4SDAHuw4qtSYBgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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