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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '119cac68214a5d25359ae3ac5056d74e881f2ad44652dd7e03adb66803bdd0b9' 
  AND token = 'iTdH2Mnpp7otK7Fr5YCXivoN7n3XQoREgqjdyftjo7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00093

JSON explain

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