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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ae3f277dfcd0b96cd50cbc149561b7327e52ec2a288c16b824fbed893cb5f03' 
  AND token = 'iHLJeQSAhWb6G7+SjNX5Vbbp/IhdG8e2o8uNTwtWDxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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