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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d2f4cbbb43f22536df2d9e90ee92bb0bfc9bec9d08cd3ad9ff4d5d5aa802ebf' 
  AND token = '0Rg2JBPuBUj3pn0kJ3zZE481NArhxoD0DDziV2jAUm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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