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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05f078458cb530c5ad93573ad83f8e67c3870dd49ebd2544d356f7df119dc1a9' 
  AND token = 'kF+fl8Za6uw+ROQ3iP9Pv8iEWgWJmTMj762ppTXIM1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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