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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd230c7daaacf565317611f2b9336e0392975208c5ba8680b156e8136c2a6547e' 
  AND token = 'y+vifTBwvQ12gkq34iyvFWKu29IK5cqpj9u62jtrZ3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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