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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9114387d591ad7bb2c989a7e631abcb5f16598f7d75315ee23c250469a7d23e0' 
  AND token = 'X0LpB1ZtI6uRAPXATjLH4e5xorFQ9mW+3mFRxSUhkpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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