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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0edee4edb0fdad556d7b14e9df1822a9f3ba9af64e6aeb7bdaa7406c4f4efc2f' 
  AND token = 'o+8Lqh1sH+hsHjJiAU/LfzbbECXKbRD48vnwqvgq+pg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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