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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25680e5802badc3b8c36a1de80d31ae0f610aa7dab40095545db80d957a654b0' 
  AND token = 'ZJ10v1PbfE8MigLptNLzBw/4XhoCDvB3a/KBzdlkQxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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