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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd1040877f67d7129d586e0d4bfcc8b88e5ff60cd3a97d1e4197e677e6679d7f' 
  AND token = 'zThaMeilY2K01SiQrr3vEisU4BZs9Ywz3V35l2j2Qt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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