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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7d36c54198a078e071c3316c308161f59c98e5bf59fac6bd844bcb13b5f9f2e' 
  AND token = 'Q2F2gqq/qBD/F/O46+1qfM39hyoefgbEqZZ+tb1w6OA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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