SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '862862d1f3ee0a55ddf0c86d212783052f20d539b4c1c5014d9df99f4cb4ac57' 
  AND token = 'LHBNF9wXTKGXrxCzN7rfseqVhxQgNVjoa4Yhi6aiM1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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