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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3c0e1e88d0e43e5120afdb4f793482ff4715851b2155b67943e7ed6b6753ca3' 
  AND token = 'VVBubkvDI/jIU/3sIk14EODQ3Ragkcif51nWOdEiXsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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