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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63c43cfd443ecf62d3e59cd426b4a0a74caebbeb3e462810ccc8d94d6771c2de' 
  AND token = 'yJVc5enaCEyLrKWUJYI/afN8+lh/n0J+vDBpN8mxlIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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