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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e927f01b5a59f23bd2c4012e6807741c741d33ce6038078bede3c28857f8499' 
  AND token = 'uqV1bX1pbrLaANNGqdLHfXuFZze69BbRjuMiG+xtaqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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