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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c905dece4d117001a65d7986ba66fddcc2ebdf418ec5ad546147a3469843f1ef' 
  AND token = 'OhqUlw5pfDaWm+zmX/8bXlnv2A8iQqoONk8ApXuDZYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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