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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d59260ec02d1d33b792eb5437a0fbbd8a761942cbcf73095ab3a4a7eaa9fabf' 
  AND token = 'NP1xAe3lUNVDm/04cjic29yrZdQsohgDZTsDu2S/mcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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