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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7ba529474ba995bc091650024866d749ddb64a2ecaa7aa677a843a11faf31ca' 
  AND token = 'Ecn1BoQmW2zQmnjxRriI1a60xWU4QjUM6ZGS8eyw3Fg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00163

JSON explain

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