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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52fab0cd5f56d54eb8df0304f642b56b7784ca5fdb364d231103b62d536e2ae0' 
  AND token = 'UwpiV4yajySGS4+nsmMtU/GRQ7z+48I67ynkRdAbDpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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