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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b00ecca99cbff43b93b6e1615d341ae508b17482f6b908a2602f1735ad480e9e' 
  AND token = 'qDl0H0DvtRuH0hMY3uuG8n0tPLWQO4fiUFKKo8qH7h0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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