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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef48d7a47e48eecbbb3c5dac5502180bf28577f2aeb8e6abc49dcb1d413edfda' 
  AND token = 'ft+bFTCcZXuEVtuFsqNeUd4xJRsC+9s986ylHFcKW0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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