Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd0792077b3eb4d0483428f9d56372e6bb58376ce71b4756e7b2e2e3167f5dce6' 
  AND token = 'yThSo7i9Wl/JiTGARSr6t8Mm3+XSEvtyX60fyq5MnLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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