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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7a8059eaf9e8bbc05d650b1560369689a259daaed9fbaaf7fb1da4ae608fec2' 
  AND token = 'bX2Ez5aMS1qXllYDajAv3865f0pVh35iwJggaZ1sT7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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