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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0162e21005831a0f4c26e98a5c43c6b92faf9c5e65f9d8bd0ff15aa3a560489b' 
  AND token = 'JwRnLXM/u0aT6pCF5Ezh1UluYSjh2fRCIw0VnEc6nAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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