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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '45fa1d524ec76e27db561944351a4a3c5ec835b6e71ef8b3111eaad1a1e8eb0b' 
  AND token = 'dIYKUC092fIeTIXFYnrz/HBjl8/eXf3IJbWcpc4b2z4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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