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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '17f1b5489ed4b98e92452d1a88ce886807753456408b2b97b0265963b21a90e1' 
  AND token = 'l2FoCVzAktjDTR1Yu7rMjE9W7FnjwlqBQBScpeYnCY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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