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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7089cd39c53199ff6f62b9ebdd9fa29ec28d6b4bbf944849538726a41dd22484' 
  AND token = 'wClcXX1/aPkF+XKxw0QKYWPomawC1FzneR9/tkg+QbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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