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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '852d0051a8e341627f8ba8c94e8393c7168bd645bc283df969ba24e6a9ba36e4' 
  AND token = 'lpjW2S1JX8j5cPTsVlCxnXz/CwEO3IxDgv6l9WaQkRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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