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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '795bfcd7551565dfbc721c6d214be57a40111c007692f8d64d1961f60377d168' 
  AND token = 'RH2wXetCEBsVPy2jlH6yGiD53+Ph/M4NidZniPFn0r8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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