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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af48d5036c82e3f46e1dd05a0b4fde7ae2a195bee5c9d6cfae4d7a21895243b5' 
  AND token = '0J07FSCtTEDClcjITMOFE/hk0sVV8q9yMefFuxsMusk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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