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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcbf7caa247d178f4f7fbf45af665b5fda088399bd19ba41c2f89b7071c0896d' 
  AND token = 'Wwp8J1kG+LhtRlnaO/CiU0JBL9IWGzzd12Y9455gyEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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