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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6023baa0eda72b8dc45a342ec62ae8d08c995fb2febcd1deb2bfd1cdd849d255' 
  AND token = 'G/sWhIJj/a8hs8B6uL4+Pku9cl+P1SFE+wbfvL2p86E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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