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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc9690d33869c79b4b3122db03eeec679fe954c5f774c7f29906aa9c19052f33' 
  AND token = 'tcUW9UnbS9zbPWAbY+dKRL1BiqYO9dRJBsTfLcwvlLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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