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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03042c422e00e3081cc3cc83cd98ef4bde2576a4662eaa32527bb602809cc2d0' 
  AND token = '+/RMRNxILxdj+159+CmJI1q2Kn4EkZx+hf/wsQ2+Hok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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