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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '61d9adc68e23c112366da85273b24c0b1b59496873b454d8bb214e821dd8203c' 
  AND token = 'Ur6laElzwvRNm3VIvkO7QxB2ptvyaf3IAuAUeaNRkD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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