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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08022744d01c4513bfee8d423f94bfc3836ffcfa9a5f7e6f78e3df704c5f7ede' 
  AND token = 'm960BGJuu4rIETCW+PtuMGtmAeHU29giPCLbhsK3rEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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