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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f82f3b1fa433ca8180a5e8b4542b1cb8a9c13b1c529531a1ef6bd3d50db5d5b' 
  AND token = 'hXAiMeEyJP06M1ZwrnPAZ4Q9fQa7JSxC/1e94cSEjfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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