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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7de04e5c68843849066e63058c9d7b983d190a439f4de7ed007f1f7d4e5609e6' 
  AND token = 'U8Ex3uezzo7FLMB34kKdggsEcuFFmRFgJlyGAkWRFBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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