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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e98cba1a3375c46292641fab8d95408081835a4b99b7883027c6839e95a05c9' 
  AND token = 'y+MNHMi6BEGnPNOH5DdwMDA0RVGpH3F+xn/+hVQe5Mc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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