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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e279f39aef08951f7bcdb822425f6701124ad03344c3b8061ac9a9b8e27414bd' 
  AND token = 'w/Q0Elxla42Odfo/O1jMYGAa7FCMygvl99WvDEfsndE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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