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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '431fe82854aeaa27634bfae8c9e5a264c5bd7952f5e4150f093a734b2a393611' 
  AND token = 'tGiJ7H3R46fj3fHM1yl0IBCeaIzogwp1jZTsKZDchis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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