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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a25b4a99046013e4f6096c2690062c81f58bc6b2712068a7567ef2f1d9ed8449' 
  AND token = 'Wmaoko2qd79lH3np5tpBfTmt2Cua1ERtRB8QPaPyOas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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