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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9096aae6e8cc44fc67d2d83ca304b031acd65c94678b45a9ac859df86091f50e' 
  AND token = 'f+gDJe+w5/qdfx3ytqboZm6vnXdGp9LmfDoLKvnzbzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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