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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92df59661c177c8ce8f4b930f5910f9b4ab7103a5f75f2c70a91b664e071cd23' 
  AND token = 'jnbFo9/bp5AiX768g5u0Ech8AcdA7yYUb9n70A8Z7/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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