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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4f64cf08a02138a4f133d17ab120e947fa5464a3617148b169ab71594f12eeb' 
  AND token = 'YLMKfcv9ZCQ9UM6fw5jtdzIXW6ZWViu2u2aJluqP11c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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