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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '609044eead9b2552e7f48dd7d22c3957643f9c7bd3296a8040a62b136ce6a615' 
  AND token = 'j0iXiMREWjSNUCvdZMseC4HLMiG5eDwY8+T8lH5n5V8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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