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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a677718d6f89d2a1bbffdfb31ba9ee2279ee6e84a32465ef92be4b925d96ea3' 
  AND token = 'JkAycyI8S7a8EVWWXP5G4UdWp3b5em2ajw0cA62s32Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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