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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1cb992ae38f1e959cd3a102765c2f76291e9e21d506749be6cbafbcb042e8bdb' 
  AND token = 'f9qB6xGzx6kxFNmi4rCcrksFMkvzC/gb7KfUs+cAIBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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