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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13ee7c4918407bce5b83c6311e0c085621ffbe97c2dd8c53703cf66ccb9efc7d' 
  AND token = 'dw26UV8HJ/l23N1v64w7NeurNg2Sy8Eyh6UlyPX4kZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}