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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52d941824dc38bb2ea94ff5731e8bfa9e6638fff43e1fa9d181d2b627b6b99f1' 
  AND token = 'VjCJb8P2DufO7dpMkdDJnsC0G8U5HRKkh2mmp2HNskY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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