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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56b03d8900f2db663e15e8dcb66152e306417179e63a39f110c61ef21b333350' 
  AND token = 'Cnv6vyHazS8d2L9Ev5O6GtkP9iRnz4TQ9TOn4sRkurI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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