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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b5bde0727bad397f5d0c5063c16fe6124c9d3d9a4375b78219ea7df19233ffc' 
  AND token = 'UbaHom20+vlZEK5kZBrsTIYfNGEn6L0HAQu7lnv0PmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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