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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abbf0dfc00441c41ecf759914f203de42b641305edf35b8d7fa132690676faee' 
  AND token = '8/qCdO3wv4RjKNHOuiz8nPFsYkitav/IWTvOkgzUReQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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